fix: timer usage across codebase (#14935)

it seems in some places we have been wrongly using the
timer.Reset() function, nicely exposed by an example
shared by @donatello https://go.dev/play/p/qoF71_D1oXD

this PR fixes all the usage comprehensively

cmd/lock-rest-server.go

@@ -239,10 +239,10 @@ func lockMaintenance(ctx context.Context) {
 		case <-ctx.Done():
 			return
 		case <-lkTimer.C:
+			globalLockServer.expireOldLocks(lockValidityDuration)
+
 			// Reset the timer for next cycle.
 			lkTimer.Reset(lockMaintenanceInterval)
-
-			globalLockServer.expireOldLocks(lockValidityDuration)
 		}
 	}
 }